command=""
started=False
stopped=False
while True:
    command=input(">").lower()
    if command=="start":
        if started :
            print("Car is already started")
        else :
            started=True
            print("Car started...")
    elif command=="stop":
        if stopped :
            print("Car is stopped")
        else:
            stopped=True
            print("Car stopped.")
    elif command=="help":
        print("""
        start - to start the car
        stop - to stop the char
        quit - to quit
        """)
    elif command!="quit":
        print("Sorry,I don't understand that !")
        break

